Illiam
Illiam is a name with a single cultural origin: Manx.
- Manx
Meaning & Origin of Illiam
What this name means, where it came from, and how it has traveled across cultures.
Illiam is a name with a single cultural origin: Manx.
Origin data from Behind the Name .
Cultural Origins (via Behind the Name)
- Manx
The Story of Illiam
Illiam first appeared in U.S. Social Security Administration records as a baby boy name in 1975, with 5 babies given the name that year. The name hit its high-water mark in 1981: 8 births, good for #4,509 nationwide. The 1980s were its strongest decade, accounting for roughly 88% of all recorded Illiams. Its most recent appearance in the national data came in 1989 (6 births); the name has since faded from the published rankings. In total, more than 42 Illiams have been born in the U.S. since records began in 1880, spanning the 1970s through the 2020s.
Popularity Over Time
Popularity by State
Names that sound like Illiam
Phonetically similar names — useful when Illiam is the vibe but a different syllable count or letter feel might suit better. Linked entries have a profile on Peek a Name.
Source: Datamuse . Phonetic similarity ranking, not curated.
Frequently Asked Questions about Illiam
What does the name Illiam mean?
What is the origin of the name Illiam?
How popular is Illiam in 2026?
When was Illiam most popular?
Is Illiam a unisex name?
What names go well with Illiam?
About the name Illiam
Illiam is a boy baby name tracked by the U.S. Social Security Administration. It first appeared in SSA records in 1975 and has accumulated 42 births in the dataset. Illiam's peak popularity came in 1981 when it ranked #4,509. Use the chart and map above to compare Illiam's trajectory across years and U.S. states, or browse the related names section to discover similar choices.
Continue exploring
- Top names of 1981 →
- Names of the 1980s →
- Names starting with "I" →
- Browse all boy names →
- Top names of 2026 →
Data sources
- Birth statistics (counts, ranks, years 1880–2026) — U.S. Social Security Administration . Predictions for years not yet released by SSA are computed by Peek a Name from historical trends; we update with official data as soon as it ships.
- Etymology, cultural origins, and related forms — Behind the Name (used under their public API terms).
- Meaning prose and editorial summary — Wikipedia article extracts, licensed under CC BY-SA 3.0 .
- Predicted nationality distribution — Nationalize.io .
- Phonetically similar names — Datamuse .
Peek a Name aggregates and presents the above data for informational purposes. Statistical predictions and external attributions are clearly labelled where shown; we make no guarantee of accuracy beyond what each source provides.